Portable dance floor



FIG. 1 is a top-perspective view of a portable dance floor showing our new design;

FIG. 2 is a top-plan view thereof, the bottom-plan view being a mirror image of the top-plan view;

FIG. 3 is a left-side elevation view thereof, the right-side elevation view being a mirror image of the left-side elevation view; and,

FIG. 4 is a rear-elevation view thereof, the front-elevation view being a mirror image of the rear-elevation view. 

The ornamental design for a portable dance floor, as shown and described. 